New production technique of sodium glutamate

Abstract

The invention discloses a novel process for producing monosodium glutamate, which comprises the following key points: performing two stages of membrane filtrations on a glutamic acid fermentation broth obtained through fermentation so as to eliminate mycoproteins and other macromolecular substances; performing decolorization through active carbons, sheet frame filtration, alkali neutralization and concentration on the fermentation broth; performing ammonia blowoff recycling in the process of the concentration; performing further decolorization through a particle carbon column; and performing concentration and crystallization to prepare the final product of the monosodium glutamate. The process achieves the procedure of converting the glutamic acid fermentation broth into sodium glutamate directly without extracting the glutamic acid, has the advantages of simple operation, short production period, low cost, less pollution, high added value of by-products, and the like, and solves the problems that the production of the monosodium glutamate by the prior art has over-dependence on sulphuric acid, high yield of wastewater and lower quality of the by-products.

Description

technical field [0001] The invention belongs to the technical field of monosodium glutamate production, and in particular relates to a new process for producing monosodium glutamate. Background technique [0002] Monosodium glutamate, chemical name sodium glutamate, is a condiment produced by fermentation of amino acid with the largest yield. In recent years, my country's monosodium glutamate industry has developed rapidly, and the sales volume of monosodium glutamate has increased year by year. According to statistics, my country's monosodium glutamate output was 1.19 million tons in 2003, and reached 1.913 million tons in 2007, accounting for more than 70% of the world's total monosodium glutamate production. [0003] The current production process of monosodium glutamate is: the glutamic acid fermentation liquid obtained by microbial fermentation, using "isoelectric point and ion exchange" to extract the glutamic acid precursor substance glutamic acid in the fermentation...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the technical problems of excessive dependence on sulfuric acid in the production of monosodium glutamate in the prior art, the large amount of waste water produced, and the low quality of by-products, and to provide a monosodium glutamate with a short production cycle, simple process, and obvious effects of energy saving, consumption reduction and emission reduction new production process